diff --git a/CHANGELOG.rst b/CHANGELOG.rst
index 3394747..fd7f749 100644
--- a/CHANGELOG.rst
+++ b/CHANGELOG.rst
@@ -17,6 +17,12 @@ Added
 -----
 * Adds search script datadog_search.py, for searching Datadog monitors and dashboards.
 
+[5.2.0] - 2024-12-05
+~~~~~~~~~~~~~~~~~~~~
+Removed
+-------
+* Removed code_owner optional path prefixes because edx-platform shims are no longer in use. See change for more details.
+
 [5.1.0] - 2024-11-21
 ~~~~~~~~~~~~~~~~~~~~
 Added
diff --git a/edx_arch_experiments/__init__.py b/edx_arch_experiments/__init__.py
index 5a61fdb..8fba891 100644
--- a/edx_arch_experiments/__init__.py
+++ b/edx_arch_experiments/__init__.py
@@ -2,4 +2,4 @@
 A plugin to include applications under development by the architecture team at 2U.
 """
 
-__version__ = '5.1.0'
+__version__ = '5.2.0'
diff --git a/edx_arch_experiments/datadog_monitoring/code_owner/utils.py b/edx_arch_experiments/datadog_monitoring/code_owner/utils.py
index ecff3af..72ca14f 100644
--- a/edx_arch_experiments/datadog_monitoring/code_owner/utils.py
+++ b/edx_arch_experiments/datadog_monitoring/code_owner/utils.py
@@ -2,7 +2,6 @@
 Utilities for monitoring code_owner_2
 """
 import logging
-import re
 
 from django.conf import settings
 from edx_django_utils.monitoring import set_custom_attribute
@@ -95,11 +94,6 @@ def get_code_owner_mappings():
             path_list = code_owner_mappings[code_owner]
             for path in path_list:
                 path_to_code_owner_mapping[path] = code_owner
-                optional_module_prefix_match = _OPTIONAL_MODULE_PREFIX_PATTERN.match(path)
-                # if path has an optional prefix, also add the module name without the prefix
-                if optional_module_prefix_match:
-                    path_without_prefix = path[optional_module_prefix_match.end():]
-                    path_to_code_owner_mapping[path_without_prefix] = code_owner
     except TypeError as e:
         log.exception(
             'Error processing CODE_OWNER_MAPPINGS. {}'.format(e)  # pylint: disable=logging-format-interpolation
@@ -157,12 +151,6 @@ def clear_cached_mappings():
     _CODE_OWNER_TO_THEME_AND_SQUAD_MAPPINGS = None
 
 
-# TODO: Retire this once edx-platform import_shims is no longer used.
-#   Note: This should be ready for removal because import_shims has been removed.
-#   See https://github.com/openedx/edx-platform/tree/854502b560bda74ef898501bb2a95ce238cf794c/import_shims
-_OPTIONAL_MODULE_PREFIX_PATTERN = re.compile(r'^(lms|common|openedx\.core)\.djangoapps\.')
-
-
 # Cached lookup table for code owner theme and squad given a code owner.
 # - Although code owner is "theme-squad", a hyphen may also be in the theme or squad name, so this ensures we get both
 #   correctly from config.
diff --git a/edx_arch_experiments/datadog_monitoring/tests/code_owner/test_utils.py b/edx_arch_experiments/datadog_monitoring/tests/code_owner/test_utils.py
index be17856..68357f4 100644
--- a/edx_arch_experiments/datadog_monitoring/tests/code_owner/test_utils.py
+++ b/edx_arch_experiments/datadog_monitoring/tests/code_owner/test_utils.py
@@ -36,13 +36,10 @@ def setUp(self):
     @ddt.data(
         ('xbl', None),
         ('xblock_2', None),
-        ('xblock', 'team-red'),
         ('openedx.core.djangoapps', None),
         ('openedx.core.djangoapps.xblock', 'team-red'),
         ('openedx.core.djangoapps.xblock.views', 'team-red'),
-        ('grades', 'team-red'),
         ('lms.djangoapps.grades', 'team-red'),
-        ('xblock_django', 'team-blue'),
         ('common.djangoapps.xblock_django', 'team-blue'),
     )
     @ddt.unpack